10-26-2012 10:21 AM - edited 03-07-2019 09:42 AM
This one has me stumped. I am connecting a 2600 router to an ISP. Interface 0/0 is connected to the ISP using DHCP. Interface 0/1 is connected to the inside providing DHCP services to the inside. At least it should only be providing DHCP services to the inside. I also have a public static IP that is NAT to a private static IP. Everything is working except the computer on the static IP. From the router I am able to ping inside and out from each interface. I am able to ping both interfaces of the router from the computer on the static IP but I cannot ping outside the router. If I do a debug all I see a reject for the gateway of the static IP but it has “mobile IP” in the text string. Not sure what mobile IP is relating to. Networks are as follows:
0/0 DHCP 10.X.X.X
0/1 192x.x.x
Static 75.X.X.X
no ip dhcp use vrf connected
ip dhcp excluded-address 192.X.X.1
ip dhcp excluded-address 192.X.X.2
ip dhcp pool CLIENT
import all
network 192.X.X.0 255.255.240.0
default-router 192.X.X.1
ip auth-proxy max-nodata-conns 3
ip admission max-nodata-conns 3
interface FastEthernet0/0
ip address dhcp
ip nat outside
ip virtual-reassembly
no ip route-cache cef
no ip route-cache
duplex auto
speed auto
no cdp enable
interface FastEthernet0/1
ip address 192.X.X.1 255.255.240.0
ip nat inside
ip virtual-reassembly
no ip route-cache cef
no ip route-cache
duplex auto
speed auto
no cdp enable
no ip forward-protocol nd
ip http server
no ip http secure-server
ip nat inside source list 102 interface FastEthernet0/0 overload
ip nat inside source static 192.X.X.2 75.X.X.21
!
access-list 102 permit ip 192.X.X.0 0.0.0.255 any
no cdp run
Thank you for any help.
10-27-2012 04:18 AM
Hi,
how does your ISP know he should route 75.X.X.21 towards your FastEthernet0/0 interface while it's receiving it's IP address from DHCP dynamically?
Is there any routing protocol running between you and your ISP?
HTH,
Milan
10-29-2012 09:05 AM
I was only given part of the information. Even though the outside interface could obtain an IP address from DHCP I should have been using the static IP address. I called the ISP this morning to get the subnet mask of the assigned static IP. Everything is working. Thanks for the reply.
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide